FB2026_02 , released June 18, 2026
FB2026_02 , released June 18, 2026
CV Term Report
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General Information
Term adult midgut ID (Ontology) FBbt:00003138 (Fly Anatomy)
Definition The middle region of the adult alimentary canal, the epithelium of which is lined with peritrophic membrane rather than chitinous intima as for the foregut and hindgut. The radius along the midgut is not uniform, with 6 major constrictions delimiting 6 regions (R0-R5). The anterior midgut (R1-R2) functions in absorption, the posterior (R4-R5) plays a role in reabsorption, and the middle acidic region (R3), which contains the copper cells (adult cuprophilic cell), in secretion and absorption.[ FlyBase:FBrf0007735 FlyBase:FBrf0208023 FlyBase:FBrf0221749 ]
Also Known As "adult ventriculus"
Comment
Links to External Ontologies
Annotations
Records annotated with this term OR any of its CHILD TERMS
Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN     321
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION      29
Insertions (FBti)  PHENOTYPE_MANIFEST_IN      30
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN     227
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Images Insertions Constructs
 adult midgut (all annotations which use CV term, excluding "NOT" statements)     321     60      6     59    247
     adult midgut | adult stage      12       --       --       --       9
     adult midgut | cell non-autonomous | somatic clone       2       --       --       --       --
     adult midgut | chemical conditional       3       --       --       --       2
     adult midgut | conditional      39       --       --       6     26
     adult midgut | female limited       2       --       --       --       1
     adult midgut | heat sensitive       4       --       --       --       4
     adult midgut | male       2       --       --       --       1
     adult midgut | mated female       2       --       --       --       2
     adult midgut | nutrition conditional       1       --       --       --       --
     adult midgut | pharate adult stage       2       --       --       --       --
     adult midgut | progressive       1       --       --       --       --
     adult midgut | somatic clone      48       --       --       4     30
     adult midgut | somatic clone | conditional       4       --       --       --       2
Spanning Tree (Parents/Children)
Only view relationship:
multi-tissue structure
 |__midgut______________
gut                     |
 |__adult gut___________|
gut section             |
 |__midgut______________|
adult alimentary canal  |
 |__adult gut___________|
                        adult midgut  1795 rec.
                         |__adult midgut constriction
                         |   |__adult midgut constriction R0-R1
                         |   |__adult midgut constriction R1-R2
                         |   |__adult midgut constriction R2-R3
                         |   |__adult midgut constriction R3-R4(+)
                         |   |__adult midgut constriction R4-R5
                         |__adult midgut epithelium 1272 rec.
                         |   |__adult anterior midgut epithelium(+) 42 rec.
                         |   |__adult differentiating enterocyte 6 rec.
                         |   |__adult midgut epithelial cell(+) 340 rec.
                         |   |__adult posterior midgut epithelium(+) 440 rec.
                         |   |__adult proventriculus epithelial zone 4(+)
                         |   |__adult proventriculus outer layer(+)
                         |   |__enteroblast(+) 267 rec.
                         |   |__intestinal stem cell(+) 659 rec.
                         |__adult midgut muscle cell 30 rec.
                         |   |__adult midgut circular muscle cell 8 rec.
                         |   |__adult midgut longitudinal muscle cell 4 rec.
                         |__adult midgut region 319 rec.
                         |   |__adult anterior midgut(+) 134 rec.
                         |   |__adult midgut region R0
                         |   |__adult midgut region R1(+) 6 rec.
                         |   |__adult midgut region R1a
                         |   |__adult midgut region R1b
                         |   |__adult midgut region R2(+) 18 rec.
                         |   |__adult midgut region R2a
                         |   |__adult midgut region R2b
                         |   |__adult midgut region R2c
                         |   |__adult midgut region R3(+) 89 rec.
                         |   |__adult midgut region R3a 4 rec.
                         |   |__adult midgut region R3ab(+) 32 rec.
                         |   |__adult midgut region R3b 4 rec.
                         |   |__adult midgut region R3c(+) 7 rec.
                         |   |__adult midgut region R4(+) 9 rec.
                         |   |__adult midgut region R4a
                         |   |__adult midgut region R4b
                         |   |__adult midgut region R4c
                         |   |__adult midgut region R5(+) 37 rec.
                         |   |__adult midgut region R5a
                         |   |__adult midgut region R5b
                         |   |__adult posterior midgut(+) 171 rec.
                         |__adult peritrophic membrane 26 rec.
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Is a midgut
Develops from midgut imaginal island
Part of adult gut
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